@Andreas_Hegenberg The pin function actually works well. When you change focus, the window sometimes flickers, which is not a problem.
But sometimes the entire window turns green (like the border) and stays that way until you change focus two or three times.
Is this a bug, or is it unavoidable because pinning is difficult anyway?
weird, looks like some debug color I‘d use for testing- I‘ll check whether there is any code path that uses a green background 
ah in that case it sounds like maybe it couldn‘t capture a screenshot, is the window still open?
Mm, the window is pinned, so it's open and in the foreground.
In most cases, it behaves normally. But sometimes (when you change the focus) it turns completely green instead of just the border being green.
Then I have to change the focus a few times (by clicking) and it goes back to normal.
I was able to narrow down the problem. It only occurs when this option is checked.
If it is not checked, the pinned window never stays green.
